From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A8955457E4F for ; Mon, 21 Sep 2026 08:59:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789981185; cv=none; b=MmgBGpv737+jPduNhaRbi5kCLvBzPYyj+sYgTG6WF3ob5Ofm17AbxRsgDmrNIzsBaPdbk6h5Vxibl6To0dVlWCV21EtYmpnNWTRducPqTiAmHgfxO7W04QiDLYy6DlvMOuy5ZL8b89R6qnpd+La5MAYcS5A8LW7TCu6Hx1OQmEs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789981185; c=relaxed/simple; bh=MxtCpLf+O8fMXcDqbLvflbINzdvEZ16LzLkZP73gn9Y=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=GDEL3O4hcXPk2PtP+ndF0ylRDUlQwj+N/YtAooYz2bS8x6gO1UiMVNivpZfsZFls/jcK/w26HePLtycJqL0YrtY0fiGP+sZyMqc9HzPxooaIyFWmJhzczL79sxgS3Eyd6l1dGPdP9fUMlh+0lPxmvsryulJgh3cpMHhwiy1GXwg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=FK+Mls5O; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="FK+Mls5O" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6EDD81D13; Mon, 21 Sep 2026 01:59:39 -0700 (PDT) Received: from raptor (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4C6993F86C; Mon, 21 Sep 2026 01:59:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1789981182; bh=MxtCpLf+O8fMXcDqbLvflbINzdvEZ16LzLkZP73gn9Y=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FK+Mls5OtsTgLk6IYJdSnW5aG5Hi2PyyG5+lNpA7QC3REm4t/EmuYUI6dSmKRkXu6 XFEllh+1aZZLvqhsP6QNU8e3ewlhe/vTWtD7rILvB8TJgTmXaueVwHGTn2TEuBko7A xMYf6KoKH2Kh+RZMiODh0bNF3jp3M3vdQMJW99+Y= Date: Mon, 21 Sep 2026 09:59:38 +0100 From: Alexandru Elisei To: Marc Zyngier Cc: will@kernel.org, julien.thierry.kdev@gmail.com, kvm@vger.kernel.org, oupton@kernel.org, fuad.tabba@linux.dev, joey.gouly@arm.com, seiden@linux.ibm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev Subject: Re: [PATCH kvmtool 0/7] Fix --vcpu-affinity Message-ID: References: <20260917154932.193943-1-alexandru.elisei@arm.com> <86zexe4ume.wl-maz@kernel.org> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <86zexe4ume.wl-maz@kernel.org> Hi Marc, On Fri, Sep 18, 2026 at 01:22:17PM +0100, Marc Zyngier wrote: > On Thu, 17 Sep 2026 16:49:25 +0100, > Alexandru Elisei wrote: > > > > Tested on an Orion board and a x86 machine. On the x86 machine, there's was this > > one thread called 'kvm-nx-lpage-re' which had affinity of the VCPUs, but I > > couldn't figure out where it was created. I grep'ed for each part of the name in > > the source node, no luck. I used strace, and couldn't see a clone call that > > returned the corresponding pid. Any clues would be appreciated. > > This is a KVM internal thread, from what I can tell. See > arch/x86/kvm/mmu/mmu.c::kvm_mmu_start_lpage_recovery(). Indeed, it didn't cross my mind that it might KVM that is creating the thread. Thanks for the hint, and to Joey too, he suggested it offline. Alex